840430407 has 8 divisors (see below), whose sum is σ = 1132126576. Its totient is φ = 554510592.

The previous prime is 840430403. The next prime is 840430421. The reversal of 840430407 is 704034048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 840430407 - 2² = 840430403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840430403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1443748 + ... + 1444329.

It is an arithmetic number, because the mean of its divisors is an integer number (141515822).

Almost surely, 2^840430407 is an apocalyptic number.

840430407 is a deficient number, since it is larger than the sum of its proper divisors (291696169).

840430407 is a wasteful number, since it uses less digits than its factorization.

840430407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888177.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 840430407 is about 28990.1777676509. The cubic root of 840430407 is about 943.6999216034.

The spelling of 840430407 in words is "eight hundred forty million, four hundred thirty thousand, four hundred seven".